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Physiological and Pathophysiological Role of Large-Conductance Calcium-Activated Potassium Channels (BKCa) in HUVECs

Fernanda Neira1, Nataly Neira1, Javier Torres1

  • 1Laboratorio de Investigación Materno-Fetal (LIMaF), Departamento de Obstetricia y Ginecología, Facultad de Medicina, Universidad de Concepción, Concepción, Chile.

Advances in Experimental Medicine and Biology
|July 19, 2023
PubMed

Insights

Large-conductance Ca2+-activated K+ (BKCa) channels in human umbilical vein endothelial cells regulate placental vascular tone. Dysfunctional BKCa channels are implicated in pregnancy complications like preeclampsia.

Area of Science:

  • Physiology
  • Molecular Biology
  • Vascular Biology

Background:

  • Large-conductance Ca2+-activated K+ (BKCa) channels are key regulators of vascular tone and blood pressure in smooth muscle cells.
  • BKCa channels are increasingly recognized for their role in endothelial cells, particularly in human umbilical vein endothelial cells (HUVECs) within the fetoplacental circulation.

Approach:

  • This review synthesizes current evidence on BKCa channel function in HUVECs and the placenta.
  • It explores the potential physiological mechanisms of BKCa in endothelium-derived hyperpolarization (EDH) for placental vascular regulation.
  • The review also examines the pathophysiological role of BKCa in pregnancy disorders characterized by hypertension and placental hypoxia, such as preeclampsia.

Key Points:

  • BKCa channels in HUVECs may be critical for maintaining fetoplacental vascular tone via EDH.
  • Evidence suggests BKCa channels are involved in regulating placental blood flow during pregnancy.
  • Dysfunction or altered expression of BKCa channels is linked to hypertensive disorders of pregnancy.

Conclusions:

  • BKCa channels play a significant role in fetoplacental vascular regulation.
  • Understanding BKCa channel function in HUVECs offers insights into pregnancy pathologies like preeclampsia.
  • Targeting BKCa channels could represent a future therapeutic strategy for managing hypertensive pregnancy complications.

Keywords:
BKCaEndothelial cellsHUVECsPlacentaPotassium channelsPreeclampsia

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